Problem w/ Security ?

A couple days ago my friend was at my web site and we were talking on AOL Instant Messenger (no i don't use AOL) and then he just shut up. I kept asking what he was doing, and then he said that he was editing some SQL variables. I thought, "Geez, I really need to get a password on that thing."

He wouldn't tell me what he changed either. Right then I shut down the serv (Apache) and MySQL and put in the password. I don't know if shutting down the server reset the variable or not, because he wouldn't tell me what he changed. He said it was a session variable for my forums, so I think it may have. ?

I use phpMyAdmin and WinMySQLAdmin with MySQL, and I don't know how to check what he was editing. Any ideas?

It doesn't appear to have any affect on the site, just curiosity is KILLING me...